"Activités de comprehension"

Boomwackers are brighly colored plastic tubes tuned by length to musical notes.

Equilateral prisms, made from high quality clear acrylic sheet.

Both versions of these economy tuning fork sets come with a mallet designed for one hard and one soft end for use with all frequencies of forks.

Break light into its components wavelengths

Make sound measurements with greater precision and convenience.

This bell jar demonstrates that sound waves can't travel and therefore can't be heard without air or matter.

This ripple tank is transparent, acrylic plastic and supported in a sturdy plastic frame.

These long-lasting aluminum tuning forks have a full sound.

A mess proof way to demonstrate waves and refraction in water.

Alloy tuning fork economy stamped.